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| Stable Diffusion Online | Midjourney | GPT Image | Adobe Firefly |
|---|---|---|---|
| Model and operator: The site stablediffusionweb.com is run by Black Technology LTD and uses Stable Diffusion XL. Its pages do not state any link with Stability AI, so it is a third-party front end. | Model and operator: Proprietary models from Midjourney, a self-funded research lab. The service is used through its website and a Discord server. | Model and operator: OpenAI image model family called GPT Image, used in ChatGPT Images and through the Image API. The API guide lists gpt-image-2.5-sunburst for editing precision and gpt-image-2.5-flare for fast everyday generation. The earlier DALL-E models are retired and ChatGPT Images replaces the DALL-E GPT. | Model and operator: Adobe own Firefly models, plus partner models from Google, OpenAI, Flux and others on paid plans. Partner outputs consume generative credits. |
| Output types: The site is built around text-to-image and also lists video generation, photo effects and video templates. | Output types: Images and videos. Video is requested with the --video parameter in Discord. | Output types: Image generation and image editing, including edits with a mask and multi-turn editing in the Responses API. Output formats are PNG, JPEG and WebP, and transparent backgrounds need PNG or WebP. Custom sizes must have edges that are multiples of 16 with no edge above 3840 pixels. | Output types: Images, video and audio, plus vector generation. Premium outputs such as video and partner models use credits. |
| Modello di costo: Presented as free, with no pricing tiers shown on the homepage. | Modello di costo: Plans are paid subscriptions. No free trial is mentioned on the plan page. | Modello di costo: ChatGPT Images is available on all tiers, including free accounts. Images with thinking is reserved for the Plus, Pro and Business tiers. API use is metered and may require API Organization Verification. | Modello di costo: A free plan with daily generations exists. Paid subscription plans offer 2,000, 4,000, 10,000 and 50,000 credits. |
| Commercial use: The FAQ states commercial use is allowed and says images fall under CC0 1.0. It adds that copyright of AI images varies by jurisdiction, so legal review is needed for products. | Commercial use: General commercial terms apply. Larger companies above a gross revenue threshold must buy the Pro or Mega plan. | Commercial use: A third-party summary of OpenAI terms states that outputs are assigned to the user on all plans and are non-exclusive. The same source notes that AI outputs lacking sufficient human authorship may not be copyrightable in the United States, so legal review is advised. | Commercial use: Adobe states that outputs of Firefly models are safe for commercial use. For partner models the user judges suitability, and eligible enterprise customers can get IP indemnification for select outputs. |
| Quando sceglierlo: Choose it for quick, no-cost SDXL tests of concepts or textures before investing in a paid service. | Quando sceglierlo: Choose Midjourney for stylised visual exploration where a subscription is acceptable. | Quando sceglierlo: Choose it for prompt-based editing of an existing image, readable text in images or API integration, and when a free ChatGPT account is enough to start. The API guide lists latency, text rendering and composition control among known limitations. | Quando sceglierlo: Choose Firefly when commercial-use terms and integration with Adobe tools matter. |
Argomenti trattati: Diffusione stabile, Text-to-image, generazione AI, sintesi di immagini, reti neurali, apprendimento automatico, elaborazione di immagini, modelli generativi, registrazione, utilizzo libero, output di immagini, interfaccia utente, ISO/IEC 25010, ISO/IEC 27001, ISO 9001 e ISO 14001.
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